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No. .622,787. Patented Apr. Il, |899.

G. P. THARP & V. A. PARK. PUMP.

(Appnzipn med Ju. s'o, 1899.)

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(No Model.)

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No. 622,787. Pate'nted Apr.l Il, |899.

G. P. THABP & v. A. PARK. PUMP.

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UNITED STATES PATENT OFFICE.

GEORGE P. THARP AND VERNON A. PARK, OF RENDVILLE, OHIO. i

PUMP.

SPECIFICATION forming part of Letters Patent N0. 622,787, dated April 11, 1899.

Application ltiledV January 30, 1899. Serial No. 703,363'. (N o'model.)

T0 @ZZ whom, it may concern:

Be it known that we, GEORGE P.THARP and VERNoNA.PARK,c-itizens of the United States, residing at Rendville, in the county of Perry and State of Ohio, have invented a new and useful Pump,of which the following is a speciication. l

Our invention relates to pumps, and has for its object to provide a simple, compact, and efiicient device having an arrangement of valved ports and channels designed to insure an efficient double action of the mechanism to produce an approximately continuous how of liquid, the interior passages being readily accessible to facilitate the adjustment and repair of the valves and cleansing of the ports.

Further objects and advantages of this invention will appear in the following description, and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings, Figure 1.is a perspective view. of a pump constructed in accordance with our invention. Fig. 2 is a longitudinal section of the same, taken in the plane of the `inlet and discharge valves.

vot Figs. 2, 3, and 4 to show the inlet-valves in plan. Fig. 6 is a horizontal sect-ion taken in the plane indicated bythe line 6 6 of Figs.

2, 3, and 4 to show the exhaust-valves in plan.

Similar reference characters indicate corresponding parts in all the iigu res of the drawings.

The body portion of the pump-casing comprises side members 10 and 11, having terminal flanges 12, between which are inserted end members or blocks 13 and 14, said members being bored longitudinally to form a cylinder 15, closed at one end bya removable head 16 and provided at the other end with a guideopening 17 for the rod or stem 18 of a piston 19. Formed in the side member 11 is an outlet-port 20, in communication with which are formed upwardly-divergent outlet-channels 21, communicating with the port 22 in ablock 23, which is coextensive with the body portion of the casing and is interposed between said body portion and a covering-block 24, said covering-block being spanned by transverse bars 25, terminally engaged by bolts 2G, eX- tending. upward from the body portion of the casing and fitted with nuts, whereby the cap and intermediate block are secured to the body portion of the casing. The inner or under side of the cap-block 24 is recessed, as shown at 27, to communicate with the port 22. Also formed in the side member 10 is an inlet-port 2S, which is in communication with upwardly-divergent passages 29, formed in said side member 10 and in tu rn communicating at their upper ends with inlet-valve chambers 30, in which are arranged the inlet-valves 31, which may be of the clack or other analogous variety. Oommunicating,respectively,with the inlet-valve chambers are cylinder-feed channels 32 and A33, which are formed in the end members 13 and 14 of the pump-casing and extend, re-

spectively, to the ends of the cylinder,where by when the cylinder-piston is moving in the direction indicated by the arrow in Fig. 2 liquid is drawn into the casing through the inlet-port 28, passes upward through one of the channels 29, unseats the controlling-valve 3l, enters the inlet-valve chamber 30, and thence passes downward through the cylinder-feed channel 32 to supply the cylinder in rear of the piston. Also formed in the intermediate block 23 are ports 34 and 35, respectively, iitted with clack or equivalent valves 36 and 37, and hence upon the return movement of the piston in a'direction opposite to that indicated by said arrow in Fig. 2 the liquid which has previously been drawn into the cylinder, as above indicated, is forced upward through the said cylinder-feed channel 32 into the inlet-valve channel 30 to unseat the valve 36, thence passes into the recess 27 in the inner surface ot' the covering-block, and downward through the port 22 and channels 2l into the outlet-port 20. Obviously during said reversing movement of the piston liquid is being inducted through the inlet-port 28, passes upward through the other channel 29 into the communicating valve chamber 30, thereby unseating the valve 3l, and thence downward through the cylinder-feed channel 33, while va repetition of the initial movement of the IOO piston in the direction of the arrow in Fig. 2 reverses the direction of movement ot the liquid by causing it to ascend through the y gain access to the inner channels or passages of the casing.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of thel invention.

Having described our invention, what we claim is'- 1. A pump-casing having a body portion composed `of separate side and end members, one of the side members .having an inlet-port and communicating valved channels, the other side member having an outlet-port and communicating channels, and the end members having passages connecting the channelsofthetrst-named side member with a cylinder, valved passages connecting said passages of lthe end members with the channels of the other side member, and means for securing said members in operative relation, substantially as specified.

2. A pump having its casing composed of terminally-interlocked side and end members, a covering-block, and an intermediate block interposed between the covering-block and said members, a cylinder formed longitudinally in the members, one of the side members having an inlet-port and communicating valved channels, the end members having passages connecting said channels with opposite ends of the cylinder, the other side member having an outlet-port and communicating channels, the covering-block being provided in its inner side with a recess, and the intermediate block being provided with valved ports connecting the passages of the end members with said recess of the coveringbloc-k, and also with a port connecting the recess of the covering-block with the channels of the second-named side member, substantially as specified.

3. A pump having a casing composed of a body portion comprising side members 10, 11 having terminal flanges, and end members 13, lliinterposed between said terminal flanges of the side members, a recessed covering-block, and an intermediate block interposed between said covering-block and the body portion of the casing, the said side members being provided respectively with inlet and outlet ports, the first-named side member with valved inlet channels communicating with valvechambers, and the second-named side mem- Vber with outlet-channels, the end members with passages for connecting said valve-chambers with opposite ends of a cylinder, the covering-block with a cavity, and the intermediate block with valved ports connecting said valve-chambers with the cavity of the covering -block, and with ports connecting said cavity with the outlet-channels, lag-screws connecting the extremities of the side and end members, transverse bars spanning the `their operative relations, substantially as speciiied.

In testimony that we claim the foregoing as our own we have hereto affixed our signatures in the presence of two Witnesses.

GEORGE P. THARP. VERNON A. PARK.

Witnesses:

T. M. POTTER, Z. M. KIRKBRIDE. 

